.app-flex {
  display: flex;
}
.app-flex-row {
  @extend .app-flex;
  flex-direction: row;
}
.app-flex-column {
  @extend .app-flex;
  flex-direction: column;
}
.app-flex-space-between {
  @extend .app-flex;
  justify-content: space-between;
}
.app-flex-space-around {
  @extend .app-flex;
  justify-content: space-around;
}
.app-flex-center {
  @extend .app-flex;
  justify-content: center;
}
.app-flex-mid {
  @extend .app-flex;
  align-items: center;
}
